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Boys' tops come in such a variety of styles and colors, they're the perfect way to start planning an entire outfit. Shop at thredUP when you're looking for an excellent selection of like-new boys' tops that range from casual to dressy and at prices up to 90% off estimated retail.
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![Bonpoint Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/520588205/complimentary.jpg)
![Bonpoint Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/520588141/complimentary.jpg)
Bonpoint
Long Sleeve Button-Down Shirt
Size 6
$14.99 $8.24 45% off with code GOBIG
93% off estimated retail![Nautica Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/517164737/complimentary.jpg)
![Nautica Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/517164661/complimentary.jpg)
Nautica
Short Sleeve Button-Down Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![E.L.K. American Classic Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/514569384/complimentary.jpg)
![E.L.K. American Classic Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/514569233/complimentary.jpg)
E.L.K. American Classic
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
84% off estimated retail![OshKosh B'gosh Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/467087792/complimentary.jpg)
![OshKosh B'gosh Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/467087661/complimentary.jpg)
OshKosh B'gosh
Long Sleeve Button-Down Shirt
Size 6
$8.99 $4.94 45% off with code GOBIG
71% off estimated retail![Baby Gap Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/514843540/complimentary.jpg)
![Baby Gap Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/514843516/complimentary.jpg)
Baby Gap
Short Sleeve Button-Down Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
63% off estimated retail![VIVERANO Organic Comfort Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/503726544/complimentary.jpg)
![VIVERANO Organic Comfort Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/503726495/complimentary.jpg)
VIVERANO Organic Comfort
Long Sleeve T-Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![U.S. Polo Assn. Short Sleeve Polo (view 2)](https://cf-assets-thredup.thredup.com/assets/513535778/complimentary.jpg)
![U.S. Polo Assn. Short Sleeve Polo (view 1)](https://cf-assets-thredup.thredup.com/assets/513535708/complimentary.jpg)
U.S. Polo Assn.
Short Sleeve Polo
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
63% off estimated retail![IZOD Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/511455912/complimentary.jpg)
![IZOD Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/511455869/complimentary.jpg)
IZOD
Long Sleeve Button-Down Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![Tommy Hilfiger Short Sleeve Polo (view 2)](https://cf-assets-thredup.thredup.com/assets/510542857/complimentary.jpg)
![Tommy Hilfiger Short Sleeve Polo (view 1)](https://cf-assets-thredup.thredup.com/assets/510542812/complimentary.jpg)
Tommy Hilfiger
Short Sleeve Polo
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
66% off estimated retail![Disney Baby Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/508493917/complimentary.jpg)
![Disney Baby Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/508493843/complimentary.jpg)
Disney Baby
Long Sleeve T-Shirt
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![The Children's Place Zip Up Hoodie (view 2)](https://cf-assets-thredup.thredup.com/assets/508072578/complimentary.jpg)
![The Children's Place Zip Up Hoodie (view 1)](https://cf-assets-thredup.thredup.com/assets/508072514/complimentary.jpg)
The Children's Place
Zip Up Hoodie
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
63% off estimated retail![First Impressions Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/505770984/complimentary.jpg)
![First Impressions Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/505770888/complimentary.jpg)
First Impressions
Long Sleeve Button-Down Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
72% off estimated retail![Best & Co. Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/484080419/complimentary.jpg)
![Best & Co. Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/484080287/complimentary.jpg)
Best & Co.
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
69% off estimated retail![Beverly Hills Polo Club Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/505414624/complimentary.jpg)
![Beverly Hills Polo Club Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/505414551/complimentary.jpg)
Beverly Hills Polo Club
Short Sleeve Button-Down Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
18% off estimated retail![Janie and Jack Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/499243803/complimentary.jpg)
![Janie and Jack Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/499243723/complimentary.jpg)
Janie and Jack
Short Sleeve T-Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
62% off estimated retail![Gymboree Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/499140872/complimentary.jpg)
![Gymboree Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/499140895/complimentary.jpg)
Gymboree
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
65% off estimated retail![Mamas & Papas Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/498121743/complimentary.jpg)
![Mamas & Papas Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/498121676/complimentary.jpg)
Mamas & Papas
Long Sleeve T-Shirt
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
27% off estimated retail![Assorted Brands Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/494821295/complimentary.jpg)
![Assorted Brands Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/494821229/complimentary.jpg)
Assorted Brands
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
77% off estimated retail![DC* Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/496791171/complimentary.jpg)
![DC* Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/496791073/complimentary.jpg)
DC*
Long Sleeve Button-Down Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
72% off estimated retail![American Apparel Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/495395116/complimentary.jpg)
![American Apparel Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/495395087/complimentary.jpg)
American Apparel
Short Sleeve T-Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
33% off estimated retail![Unbranded Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/494937922/complimentary.jpg)
![Unbranded Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/494937884/complimentary.jpg)
Unbranded
Short Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
69% off estimated retail![Beluga Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/494190645/complimentary.jpg)
![Beluga Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/494190604/complimentary.jpg)
Beluga
Short Sleeve Button-Down Shirt
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
56% off estimated retail![Sonoma Goods for Life Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/487768115/complimentary.jpg)
![Sonoma Goods for Life Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/487768016/complimentary.jpg)
Sonoma Goods for Life
Short Sleeve T-Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
37% off estimated retail![Gap Kids Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/488552900/complimentary.jpg)
![Gap Kids Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/488552858/complimentary.jpg)
Gap Kids
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
68% off estimated retail![Mudpie Baby Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/489395027/complimentary.jpg)
![Mudpie Baby Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/489395008/complimentary.jpg)
Mudpie Baby
Long Sleeve Button-Down Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
89% off estimated retail![Jonathan Strong Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/488239833/complimentary.jpg)
![Jonathan Strong Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/488239713/complimentary.jpg)
Jonathan Strong
Long Sleeve Button-Down Shirt
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
68% off estimated retail![Hartstrings Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/487567734/complimentary.jpg)
![Hartstrings Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/487567876/complimentary.jpg)
Hartstrings
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
84% off estimated retail![U.S. Polo Assn. Short Sleeve Polo (view 2)](https://cf-assets-thredup.thredup.com/assets/487256496/complimentary.jpg)
![U.S. Polo Assn. Short Sleeve Polo (view 1)](https://cf-assets-thredup.thredup.com/assets/487256475/complimentary.jpg)
U.S. Polo Assn.
Short Sleeve Polo
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
63% off estimated retail![Joe's Jeans Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/481288267/complimentary.jpg)
![Joe's Jeans Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/481288286/complimentary.jpg)
Joe's Jeans
Short Sleeve Button-Down Shirt
Size 6
$10.99 $6.04 45% off with code GOBIG
77% off estimated retail![Assorted Brands Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/476357375/complimentary.jpg)
![Assorted Brands Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/476357300/complimentary.jpg)
Assorted Brands
Short Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
69% off estimated retail![iDO by Minicomf Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/475179560/complimentary.jpg)
![iDO by Minicomf Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/475179611/complimentary.jpg)
iDO by Minicomf
Long Sleeve Button-Down Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
84% off estimated retail![Old Navy Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/472132994/complimentary.jpg)
![Old Navy Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/472132889/complimentary.jpg)
Old Navy
Long Sleeve Button-Down Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
37% off estimated retail![OshKosh B'gosh Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/470281702/complimentary.jpg)
![OshKosh B'gosh Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/470281584/complimentary.jpg)
OshKosh B'gosh
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
68% off estimated retail![Assorted Brands Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/469217248/complimentary.jpg)
![Assorted Brands Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/469217207/complimentary.jpg)
Assorted Brands
Short Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
69% off estimated retail![Rocawear Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/468572544/complimentary.jpg)
![Rocawear Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/468572451/complimentary.jpg)
Rocawear
Short Sleeve Button-Down Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
59% off estimated retail![Next Level Apparel Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/468195311/complimentary.jpg)
![Next Level Apparel Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/468195255/complimentary.jpg)
Next Level Apparel
Short Sleeve T-Shirt
Size 6
$6.99 $3.84 45% off with code GOBIG
36% off estimated retail![First Impressions Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/467967499/complimentary.jpg)
![First Impressions Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/467967440/complimentary.jpg)
First Impressions
Long Sleeve T-Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
50% off estimated retail![Calvin Klein Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/464140332/complimentary.jpg)
![Calvin Klein Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/464140317/complimentary.jpg)
Calvin Klein
Short Sleeve T-Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
58% off estimated retail![Koala Baby Boutique Short Sleeve Polo (view 2)](https://cf-assets-thredup.thredup.com/assets/463244471/complimentary.jpg)
![Koala Baby Boutique Short Sleeve Polo (view 1)](https://cf-assets-thredup.thredup.com/assets/463244434/complimentary.jpg)
Koala Baby Boutique
Short Sleeve Polo
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![Hurley Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/463396683/complimentary.jpg)
![Hurley Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/463396660/complimentary.jpg)
Hurley
Long Sleeve Button-Down Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
84% off estimated retail![Class Club Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/458464820/complimentary.jpg)
![Class Club Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/458464800/complimentary.jpg)
Class Club
Long Sleeve Button-Down Shirt
Size 6
$8.99 $4.94 45% off with code GOBIG
72% off estimated retail![Baby Gap Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/287882828/complimentary.jpg)
![Baby Gap Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/287882812/complimentary.jpg)
Baby Gap
Long Sleeve Button-Down Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
66% off estimated retail![The Children's Place Outlet Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/457097715/complimentary.jpg)
![The Children's Place Outlet Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/457097577/complimentary.jpg)
The Children's Place Outlet
Short Sleeve Button-Down Shirt
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
27% off estimated retail![Intradeco Apparel Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/456144527/complimentary.jpg)
![Intradeco Apparel Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/456144497/complimentary.jpg)
Intradeco Apparel
Short Sleeve T-Shirt
Size 6
$9.99 $5.49 45% off with code GOBIG
37% off estimated retail![OshKosh B'gosh Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/445961132/complimentary.jpg)
![OshKosh B'gosh Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/445961117/complimentary.jpg)
OshKosh B'gosh
Short Sleeve Button-Down Shirt
Size 6
$7.99 $4.39 45% off with code GOBIG
75% off estimated retail![Tommy Hilfiger Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/445597675/complimentary.jpg)
![Tommy Hilfiger Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/445597580/complimentary.jpg)
Tommy Hilfiger
Short Sleeve Button-Down Shirt
Size 6
$8.99 $4.94 45% off with code GOBIG
72% off estimated retail![Colosseum Athletics Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/443382469/complimentary.jpg)
![Colosseum Athletics Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/443382432/complimentary.jpg)
Colosseum Athletics
Short Sleeve T-Shirt
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
53% off estimated retail![George Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/436940678/complimentary.jpg)
![George Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/436940676/complimentary.jpg)
George
Short Sleeve Button-Down Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
18% off estimated retail![U.S. Polo Assn. Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/436946516/complimentary.jpg)
![U.S. Polo Assn. Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/436946466/complimentary.jpg)
U.S. Polo Assn.
Short Sleeve Button-Down Shirt
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
76% off estimated retail![Coogi Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/306045410/complimentary.jpg)
![Coogi Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/306045377/complimentary.jpg)
Coogi
Long Sleeve Button-Down Shirt
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
74% off estimated retail![Janie and Jack Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/430085647/complimentary.jpg)
![Janie and Jack Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/430085608/complimentary.jpg)
Janie and Jack
Short Sleeve T-Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
62% off estimated retail![Aston Martin Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/424864895/complimentary.jpg)
![Aston Martin Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/424864833/complimentary.jpg)
Aston Martin
Long Sleeve T-Shirt
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
69% off estimated retail![American Heritage Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/412342347/complimentary.jpg)
![American Heritage Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/412342311/complimentary.jpg)
American Heritage
Long Sleeve Button-Down Shirt
Size 6
$8.99 $4.94 45% off with code GOBIG
79% off estimated retail